baber/WOPTO huggingface dataset:
Patent GB-893967-A (GB)
Title: Preparation of 1-b-hydroxypropyltheobromine
IPC: C07D473/10
Filed: 1959-11-17
Abstract: 1-b -Hydroxypropyltheobromine is prepared by condensing an alkali metal salt of theobromine with a halohydrin of the formula X-CH2-CHOH-CH3 (wherein X represents an atom of a halogen other than fluorine) in a liquid medium at 80 DEG C.-100 DEG C., and, if desired, in the presence of a condensing agent.ALSO:Pharmaceutical preparations, suitable for treating coronaropathic syndromes, affections of the cerebral and renal blood vessels and hypertension states, comprise: (a) 1-b -hydroxypropyltheobromine together with either another purine derivative having a diuretic effect or a central nervous system depressant (e.g. a barbiturate), and with a pharmaceutical diluent; or (b) b -hydroxypropyltheobromine and either a solid pharmaceutical diluent (e.g. in the form of a tablet, pill, granule, powder or suppository), or a sterile parenterally administrable liquid diluent, or a liquid orally administrable diluent and a flavouring agent (e.g. in the form of a syrup). Reference is also made to preparations in which the diuretic effect of digitalis is potentiated by the addition of 1-b -hydroxypropyltheobromine.
Patent GB-1026545-A (GB)
Title: Improvements in or relating to amplifiers
Inventor: SIKORRA DANIEL JULIUS
IPC: G06G7/18
Filed: 1962-10-15
Abstract: 1,026,545. Transistor amplifying circuits. HONEYWELL Inc. Oct. 15, 1962, No. 39005/62. Heading H3T. [Also in Division G4] In an amplifier with feedback between input and output terminals these terminals are at the same potential in the absence of an input signal. A two-stage direct-coupled transistor amplifier comprises a pair of NPN transistors 22, 30 with the input signal applied in pushpull to their bases, which are connected to earth over resistors 26, 34 respectively. The emitters are connected via a common resistor 35 to a source of negative potential. Loads 42, 40 are provided in the respective collector circuits which are direct-coupled via leads 51, 45 respectively to the bases of a pair of PNP transistors 52, 46. A capacitor 43 connected between the collectors prevents high-frequency instability. The emitters of transistors 52, 46 are connected via a common resistor 56 to a source of positive potential, and their collectors via load resistors 60, 57 respectively to a source of negative potential. Output terminals 63, 62 are connected to the respective collectors 55, 49 and are back-coupled to give negative feedback, to the input terminals 21, 20 respectively via resistors 67, 64 respectively. The D.C. conditions are so adjusted that in the absence of an input signal no current flows in the resistors 64, 67. In addition, positive feedback is applied between the output terminal 62 and input terminal 21 via series-connected resistor 65 and capacitor 66, so that the output of the amplifier contains a first component proportional to the input signal and a second corresponding to the time derivative; the arrangement is made such that with no input the positive and negative feedback balance one another. In a modification, the negative feedback resistors 64, 67 are omitted and the resistor 65 returned to the collector of transistor 52 instead of that of transistor 46; the arrangement then gives an output containing a component proportional to the time integral, instead of the derivative, of the input signal.
Patent GB-835908-A (GB)
Title: Heterocyclic dyestuff intermediates
Filed: 1956-12-24
Abstract: The invention comprises a multicomponent mixture of compounds having the formula <FORM:0835908/IV (b)/1> wherein one adjacent pair of Y valencies are bonded to hydrogen atoms and the other adjacent pair of Y valencies are bonded to a group having the formula <FORM:0835908/IV (b)/2> <FORM:0835908/IV (b)/3> where X is NO2 or NH2 and is attached in the a -position; the second radical above may be attached to either of the Y positions, while the third and fourth radicals may be attached to the Y positions only in accordance with the numbers shown.  Mixtures of the above compounds in which X is NO2 may be prepared by reacting 8 - nitro - 2,3 - dichloro - 1,4 - naphthoquinone with 1-naphthol, 2-naphthol, 1,5-dihydroxy- or 2,6-dihydroxy-naphthalene, at elevated (preferably boiling) temperatures in the presence of an organic tertiary amine base as acid-binding agent.  The mixtures of compounds in which X is NH2 may then be obtained by reduction with an alkaline reducing agent, such as alkaline sodium hydrosulphide or sodium hydrosulphite, to obtain the leuco form of the amino compound, which may be converted to the keto form by oxidation, e.g. with air.
Patent GB-1061386-A (GB)
Title: Aircraft navigation instrument
Inventor: SULLIVAN NEIL
IPC: G01C23/00
Filed: 1962-10-17
Abstract: 1,061,386. Aircraft navigation instruments. SPERRY GYROSCOPE CO. Ltd. Oct. 14, 1963 [Oct. 17, 1962], No. 39311/62. Heading B7W. An aircraft instrument, particularly for V.T.O.L. aircraft, comprises an artificial horizon 4 with a movable index 10 arranged to be displaced vertically in accordance with the flight path angle of the aircraft. The index 10 moves over graduations, marked 1, 2, 3 (representing tens of degrees) on a gyro ball 2, the flight path angle being derived by dividing rate of climb or descent (obtained by barometric capsule or radio altimeter) by the ground speed. The divisor is held constant below a predetermined ground speed so that the position of the index 10 indicates the rate of descent or climb. Flight directors 8, 9 are provided, and are operated by navigational signals, the aircraft being flown so that they are aligned with a fixed index 1 in level flight, when the movable index 10 may be biased out of view, and intersect over the movable index during the descent. A pointer 6 is also provided to indicate, by its deviation from a mark 7 any error in the flight speed. When landing a V.T.O.L. aircraft, a signal may be applied to the horizontal flight director 9 at a predetermined point to cause the pilot to level out, e.g. 70 feet above the ground, before making the final descent. The movable index may also be arranged, for use during take-off, to be displaced substantially in inverse correspondence with the flight path angle, and a fixed index indicating the desired angle may be provided. The signals to the movable index may also be modified by pitch error signals.
Patent GB-1481588-A (GB)
Title: Method for drying an uncooked foodstuff
IPC: A23L19/00
Filed: 1975-09-25
Abstract: 1481588 Drying foodstuffs NATIONAL STARCH & CHEMICAL CORP 25 Sept 1975 [25 Sept 1974] 39315/75 Heading A2D A method for drying an uncooked foodstuff comprises mixing said foodstuff with a starch that is in an amount of 20 to 96% by weight of the anhydrous weight of the resultant mixture of starch and foodstuff, said foodstuff being in comminuted form during said mixing, such that said mixture comprises said foodstuff in comminuted form, and drying the mixture by means of a drum dryer apparatus at a temperature in the range of 290 to 350F and to a moisture level of less than 10% by weight of the dried mixture. The starch is suitably tapioca, waxy maize starch or corn starch. Preferably the dried mixture has a water activity below 0.6. The drying of beet, onion, pineapple, lemon, tomato paste, orange (including orange juice), peppers, strawberry, blueberry and apple is exemplified.
Patent GB-992588-A (GB)
Title: Semi-conductor devices
IPC: H01L21/60
Filed: 1961-11-02
Abstract: 992,588. Semi-conductor devices. SIEMENSSCHUCKERTWERKE A.G. Nov. 2, 1961 [Nov. 2, 1960], No. 39340/61. Heading H1K. An electrode alloyed into a semi-conductor body is attached to a substantially laminar area constituting or forming part of a further conductor by multiple electrical spot resistance welding. The area is provided with a plurality of apertures or with an aperture comprising a plurality of interconnected slots. During operation thermal expansion is taken up by the slots or apertures. In a typical arrangement, Fig. 1, a device consisting of a silicon wafer 3 provided with alloyed-in electrodes 4, 5 is mounted on a threaded copper stud 1 through the intermediary of a copper plate 7 and a plate 6 of tantalum or tungsten or a molybdenum coated with copper-nickel-iron alloy. The upper alloyed electrode 4 is attached to a metal cup 11 through the intermediary of a conductor 8, shown in plan, before assembly, in Fig. 2, consisting of a radially cut plate 9 with flexible radial extensions which are bent up and clamped to cup 11 by a ring 13. The plate section is spot-welded to electrode 4 as indicated at 16. Alternatively spot welds are made only along the periphery in which case the central section may be dispensed with. The copper plate 7, soldered or welded between stud 1 and metal plate 6, is provided with a series of slots or apertures in the manner illustrated in any of Figs. 3 to 7. A similar configuration may also be used for the plate section of conductor 8. The configuration shown in Fig. 5 with arcuate slots is suitable for connection by spot welds 22a disposed on the tabs formed by the arcuate slots. In this case the spot welding tool may be arranged to press the tabs out of the plane of the plate so that thermal expansion stresses can be absorbed by a relative lateral movement between the tabs and the body of the plate. Alternatively the spot welds are formed between the tabs leaving the latter upstanding.
Patent GB-1480985-A (GB)
Title: Rotary internal combustion engine
IPC: F01C1/356
Filed: 1975-09-25
Abstract: 1480985 Rotary positive-displacement fluidmachines J E SCHULZ 25 Sept 1975 39362/75 Heading F1F In an I.C. engine a rotor 18 has lobes 28a, 28c, co-operating with spring-loaded sliding vanes, or "gates", 34, 44 and induction and exhaust conduits 74a, 74b in the lobe 28c, correspond with ports 76a, 76b formed in the housing side-walls below a combustion chamber 60. Ignition may be effected by compression or a spark-plug. Spring-biased pins (56a), Fig. 2A (not shown), may be mounted in flanges 52a on each gate so as to engage with grooves 58a in the rotor side faces and thus hold the gate against the rotor during the compression and combustion phases of the working cycle. To relieve back-pressure on the leading side of the gate 34 a groove 62 may be formed in the leading corner of the lobe 28a or, alternatively, a groove (64), Fig. 5A (not shown), is formed in the housing on the leading side of said gate. The working cycle is performed in the region between the gates, induction and exhaust phases being executed by the lobe 28c, and the compression and expansion phases by the lobe 28a. The engine may be modified so as to have either two pairs of gates and two pairs of rotor lobes or more than two pairs of gates but only a single pair of rotor lobes, Figs. 7 and 8 (not shown). The nature and arrangement of the conduits in the rotor may be modified in several ways, Figs. 11 to 16 (not shown), for details of which the Specification should be referred to. One or both of the conduits may be furnished with a centrifugally-operated valve, or "closure", arranged to increase the effective size of the conduit in accordance with an increase of rotor speed, Fig. 10 (not shown).
Patent GB-1483815-A (GB)
Title: Particle detecting system
IPC: G01N21/55
Filed: 1974-09-10
Abstract: 1483815 Analyzing submicron particles BLOCK ENG Inc 10 Sept 1974 [27 Sept 1973 19 Aug 1974] 39374/74 Heading G1A In a system for analyzing submicron particles in a fluid medium, light from a source 22 passes along a cell 20 by total internal reflection, a sample 30 placed on a surface of the cell is subjected to an evanescent wave formed by the total internal reflection and the resulting intensity modulation is frequency analyzed. The modulation is generated by Brownian movement, the rate of which is  related to size. -The source light is preferably mono-chromatic, and may be of a wavelength to excite fluorescence in the particles if they are suitably starred. The internal reflection angle and angle of incidence on the cell inlet surface 28 may be altered by mirror 28. The cell must be made of a material of higher refractive index than the medium 30, generally suitable materials being crown or flint glass, quartz, silica and synthetic organic polymers such as polystyrene and polymethylmethacrylate. The light output is preferably detected using a microscope with its object plane in the region of the medium traversed by the evanescent wave. The resulting output may be beam split, filtered, detected and the resulting electrical signals amplified and frequency analyzed.
Patent GB-1202041-A (GB)
Title: Salts of amino sulphonic acids and compositions thereof
Inventor: GLUCK BRUNO ANTHONY
IPC: C11D3/48
Filed: 1966-09-02
Abstract: 1,202,041. Salts of aminosulphonic acids. B. A. GLUCK. 23 Aug., 1967 [2 Sept., 1966], No. 39387/66. Heading C2C. [Also in Divisions A5 and C5] Novel compounds of the general formula RNR<SP>1</SP>.(CH 2 ) n .SO 3 M, wherein R is alkyl (C 9-11 , C 13 , C 16 ) or the group ALK.NR<SP>1</SP>(CH 2 ) n  in which ALK is alkyl (C 8-18 ), R<SP>1</SP> is hydrogen or alkyl, n is zero or 1-6 in the case where R is the group ALK.NR<SP>1</SP>(CH 2 ) n , and otherwise is 1-6 inclusive, and M is an alkali metal ion, an ammonium ion or the ion of an organic base are prepared by reacting a fatty amine with either chlorosulphonic acid or with a chloroalkylsulphonic acid. Examples prepare
Patent GB-345663-A (GB)
Title: An improved protractor circle for use in wireless direction-finders
IPC: G01S1/02
Filed: 1929-12-24
Abstract: 345,663. Directive wireless signalling. ARMSTRONG, J. J. V., 12, Church Street, Liverpool.-(Telefunken Ges. f³r Drahtlose Telegraphie ; 12, Hallesches Ufer, Berlin.) Dec. 24, 1929, No. 39393. [Class 40 (v).] To facilitate a direct reading of the critical angle in wireless direction-finding equipment, one or more quadrantal correction curves, such as f, are marked out around an abscissa circle, concentric with the protractor circle d. Alternate quadrants such as 1, 3 are shown in different colours to quadrants 2, 4. The required correction to the nominal reading is given by the intercept of the pointer C on the curve f, this, in turn, being thrown down on to the reading edge. d by a series of arcuate lines l, r, marked red or green according as the correction is a positive or negative factor. A compass card is preferably mounted inside the protractor circle, as shown.
Patent GB-917344-A (GB)
Title: A method of filling moulds in a machine for making multi-colour ice lollies or similar frozen products
IPC: A23G9/48
Filed: 1961-11-03
Abstract: 917,344. Ice-making. BRODRENE GRAM A.S. Nov. 3, 1961 [Nov. 4, 1960], No. 39501/61. Class 29. In a machine for making multi-colour ice lollies or similar frozen products, in which each mould is filled successively with layers of different liquids by a tube introduced into the mould, the second and subsequent (if any) layers are introduced via a flow obstructing member located approximately on a level with the surface of the preceding layer. This member directs the liquid to flow in a substantially horizontal direction so as to avoid mixing with the preceding layer. As shown, the member comprises a V-strap 6 on the end of the filling tube 5. After the first liquid layer 1 has been introduced into the mould 4, the tube is positioned as shown in Fig. 1 with the straps 6 in contact with or immediately adjacent the wall of the mould, whereby the second liquid 2 flows from the tube down the wall of the mould and is deflected by the straps so as to flow over the surface of the liquid 1. After the second liquid has been introduced, the tube is displaced to the position shown in Fig. 2 for introduction of a third liquid 3, Fig. 3. The tube may have two diametrically opposed ends each provided with a strap. Alternatively, the flow obstructing member may comprise horizontal step portions on the edge of the mould (Figs. 10-12, not shown) or may be formed by partial freezing of the liquid in the preceding layer followed by removal by a suction tube 7, Fig. 6, of a portion of the liquid so as to form a circumferential frozen edge 8.
Patent GB-1161669-A (GB)
Title: A Method of and Apparatus for Filling Pressurised Spray Containers with Propellent Gases
Inventor: SIEBEL CARL GISBERT
IPC: B65B31/00
Filed: 1966-09-05
Abstract: 1,161,669. Filling bottles with gas. C. G. SIEBEL. 5 Sept., 1966 [3 Sept., 1965], No. 39542/66. Heading F4P. [Also in Division F1] A pressurized spray container (not shown) having an outlet valve or seal, is filled with a propellent gas in an exclusively gaseous state, by filling a chamber 112 with the gas at a pressure of at least 30 atmospheres and thereafter connecting the chamber to the container to be filled through a valve 113 and a filling head 114, the gas pressure being arranged to open the valve or seal and enter the container. The gas may be nitrogen, nitrous oxide or carbon dioxide. The chamber 112 has one wall defined by a diaphragm 111, the position of which is adjustable by a column of liquid 107 movable by a piston 105 itself movable by a screwed spindle 102. If the pressure of the gas at source is sufficiently high, the gas is fed to the chamber through a reducing valve 117 and a port 118 in the valve 113, whereafter the valve 113 is simply changed over by mechanical, hydraulic or pneumatic means. If the pressure of the source gas is too low the chamber 112 is filled through a reducing valve 116 and a non-return valve 115, and a piston 103 coupled to the piston 105 is actuated by compressed air to thereby move the column of liquid 107 and thus cause the diaphragm to expel the gas in the chamber 112 through the valve 113 into the container at an intensified pressure. The chamber 112 may be in the form of a cylinder adjustable in volume by a movable piston.
Patent GB-1058799-A (GB)
Title: Method for producing 1,2-dichloroethane and vinyl chloride from ethylene and hydrogen chloride
IPC: C07C17/156
Filed: 1964-09-29
Abstract: 1,058,799. Oxychlorination catalysts. ASAHI KASEI KOGYO KABUSHIKI KAISHA. Sept. 29, 1964 [Oct. 7, 1963; Oct. 8, 1963; April 8, 1964], No. 39641/64. Heading B1E. [Also in Division C2]. An oxychlorination catalyst supported on active carbon comprises at least one gold or platinum component selected from group "A" below and at least one copper component selected from group "B" below, and, optionally, at least one member of group "C" below. Group "A" sonsists of metallic gold, gold oxides, hydroxides, fluorides, chlorides, bromides, iodides, cyanides, sulphides, sulphates and nitrates, chloroauric acid, platinium metal, platinum oxides, hydroxides, fluorides, chlorides, bromides, iodides, sulphates and sulphides, platinic nitrate, platinum ammonium chlorides and hydrochloroplatinous acid. Group "B" consists of metallic copper, copper oxides, hydroxides, chlorides, acetates and sulphides, cuprous formate and iodide, and cupric bromide, carbonate, chlorate, phosphate, sulphate and oxalate. Group "C" consists of the metals themselves and the chlorides, oxides, hydroxides, nitrates, sulphides, sulphates, carbonates, phosphates and acetates of Ag, Zn, Cd, Hg, Pb, Cr, Fe, Ru, Pd, Os, Ir and Rh. In example 1 the active carbon support has a surface area of 1100 m<SP>2</SP>/gr. In example 12 the support used is 50 to 100 mesh active carbon. Reference has been directed by the Comptroller to Specification 968,933.
Patent GB-1056209-A (GB)
Title: Fluid by pass valves
Inventor: SLATER GEORGE EDWARD
IPC: F16K31/68
Filed: 1965-09-16
Abstract: 1,056,209. Valves. ROCKWELL-STANDARD CORPORATION. Sept. 16, 1965, No. 39654/65. Heading F2V. Surplus lubricant returned from a gear-box and a constant speed drive of a jet engine to a reservoir passes through a thermally-responsive valve 32 which functions as a by-pass for a heat exchanger 58, the valve also acts as a pressurerelief device in which it overrides the thermal actuation. When the lubricant temperature is below a given level, a spring 132 unseats a closure 126 and lubricant passes from an inlet 30 directly to an outlet 34. Upon the given temperature level being exceeded a stack of bimetallic discs 134 expands and urges a piston 118, a hollow rod 116 and the closure 126 attached thereto to the left until the latter seats on the pressurerelief closure 102 so causing the lubricant to flow to the outlet via the heat exchanger 58. The piston end 119 and the opposing surface on the closure 126 are hydraulically balanced so relieving the load to be moved by the bimetallic discs. Should the pressure differential across the valve exceed a predetermined value, e.g. due to a clogged heat-exchanger, the closure 126 is urged to seat on the pressure-relief closure 102 which is then moved from its seat 92, 94 against a spring 104 and the fluid pressure on piston end 119.
Patent GB-1389988-A (GB)
Title: Multi-cylinder double-acting stirling cycle engines
IPC: F02G1/053
Filed: 1973-08-22
Abstract: 1389988 Stirling cycle engines UNITED STIRLING (SWEDEN) AB & CO KB 22 Aug 1973 39694/73 Heading F1S The invention relates to a multi-cylinder doubleacting Stirling cycle engine of the kind in which each cylinder contains a piston 34, 36 which separates a low temperature working space from a high temperature working space in the cylinder and each piston separates from each other two different charges of working gas, each piston having at least two axially spaced piston rings 38, 39. According to the invention each piston is provided with an internal cavity 37 having a volume greater than the swept volume of the cylinder and with at least one passage 40 connecting the cavity to a space at the outer surface of the piston between the two piston rings, means being provided for maintaining minimum cycle pressure in the cavity. As shown the piston rings co-operate with grooves in the piston and act as non-return valves which ensure that minimum cycle pressure is maintained in the cavity.
Patent GB-847691-A (GB)
Title: Improvements in or relating to thermally sensitive devices
Inventor: HUMPHREYS OLLIVER WILLIAM
IPC: H01C7/04
Filed: 1957-12-23
Abstract: A compound strip or disc operating in the manner of a bimetal, e.g. in an electric switch, comprises a metal layer, such as copper or beryllium copper, bearing an element or coating of ceramic material or a coating of glass or enamel.  A strip of copper 0.005 inch thick may be coated with zircon on one side to an equal thickness, by flame-spraying such as that described in Specification 745,257.
Patent GB-1191177-A (GB)
Title: Photomechanical Production of Printing Plates
IPC: G03F7/037
Filed: 1967-09-01
Abstract: 1,191,177. Photopolymerizable compositions. BADISCHE ANILIN- & SODA-FABRIK A.G. 1 Sept., 1967 [2 Sept., 1966; 6 Sept., 1966], No. 40068/67. Heading C3P. [Also in Division G2] Photopolymerizable mixtures for use in producing printing plates comprise a polyamide, m- or p-xylylene-bis-acrylamide, triethylene glycol diacrylate and, optionally, butanediol monoacrylate, hexamethylene bisacrylamide and maleic anhydride, a photoinitiator, e.g. benzoin methyl ether, and a polymerization inhibitor, e.g. hydroquinone, p-methoxy-phenol or p-t-butyl-cresol.